Robotically Controlled Telescopes
Faulkes Robotic Telescope Project
GLORIA Project / GLObal Robotic-telescope Intelligent Array
MicroObservatory Robotic Telescope Network
Astronomical Databases & Sky Surveys
American Association of Variable Star Observers (AAVSO)
Sloan Digital Sky Survey (SDSS)
Mikulski Archive for Space Telescopes (MAST)
Catalina Real-Time Transient Survey (CRTS)
All Sky Automated Survey (ASAS)
ASAS-SN Sky Patrol (All-Sky Automated Survey for Supernovae)
Northern Sky Variability Survey (NSVS)/Skydot
Large Synoptic Survey Telescope (LSST)
Transiting Exoplanet Survey Satellite (TESS)
Astronomical Resources on the Internet
Optical Astronomy
National Optical Astronomy Observatory (NOAO)
US Virtual Astronomical Observatory (US-VAO)
Radio Astronomy
National Radio Astronomy Observatory (NRAO)
Australian Telescope National Facility
Max Planck Institute for Radio Astronomy
Society of Amateur Radio Astronomers (SARA)
In Search of Erupting Black Holes
Exoplanet Astronomy
Galactic Astronomy
Astrophysics and Gravitational Wave Physics
Harvard Center for Astrophysics
Goddard Space Flight Center Astrophysics Science Division
ASI Science Data Center
Laser Interferometer Gravitational-Wave Observatory (LIGO)
Global Rapid Advanced Network Devoted to the Multi-messenger Addicts
Microlensing Follow-Up Network (MicroFun)
Center for Backyard Astrophysics
Society for Astronomical Sciences (SAS)
Spacecraft Missions
Hubble Space Telescope (Optical)
Planck (Cosmic Microwave Background)